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# Fullstack Engineer

- **Company:** Búsqueda Avanzada
- **Location:** Madrid, Spain
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Software Quality, Code Review, Cursor (Graphical User Interface Elements), Distributed Systems, PostgreSQL, Node.Js, RabbitMQ, Redis, Software Tools, Blockchain, Software Engineering, Systems Integration, TypeScript, GitHub Copilot, ReactJS, Large Language Models, Reliability of Systems, Backend, AngularJS, Git Flow, Kubernetes, Production Code, Web3.js, Restful APIs, Docker
- **Published:** August 28, 2026
- **Apply:** https://www.adzuna.es/contact-us.html

## About the Role

+ 7+ years of software engineering experience.
 + Strong commercial experience with Node.js and TypeScript.
 + Experience designing scalable architectures and distributed systems.
 + Solid understanding of PostgreSQL, Redis, REST APIs, and asynchronous patterns.
 + Experience with Docker and CI/CD pipelines.
 + Experience leading engineers and driving technical decisions.
 + Strong hands-on approach and willingness to stay close to the code.
 + Experience using AI tools such as Cursor, GitHub Copilot, Claude Code, or similar in daily development.
 + English B2/C1.
Nice to Have

 + Experience with React or Angular.
 + Experience with RabbitMQ, Kubernetes, and GitOps.
 + Experience with Web3 or blockchain products.
 + Experience integrating LLM APIs and AI capabilities into products

## Description

We are looking for a Lead FullStack Engineer with strong backend expertise to help us build reliable, scalable, and high-quality products.
You will lead a small engineering team consisting of 3 engineers and 2 QA specialists. This is a hands-on role requiring deep involvement in architecture, complex technical challenges, and production development.
We expect you to actively leverage AI tools to improve engineering quality and development velocity.
Responsibilities

 + Design and develop scalable backend services and APIs.
 + Drive architecture decisions and ensure high engineering standards.
 + Write production-ready code and actively use AI tools to accelerate development.
 + Solve complex technical challenges and improve system reliability.
 + Lead code reviews and maintain code quality across the team.
 + Mentor engineers and help increase team productivity.
 + Collaborate closely with Product, Design, and QA teams.
 + Continuously improve development processes and engineering practices.


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